Hey, expectant moms, that baby kicking you in the stomach may be doing it with a sly grin. Or maybe a frown.

Your child might even be crying.

Amazing new technology is allowing doctors in England to see facial expressions and the emotional outpouring of fetuses in the womb.

The astonishing close-range detailed photographs show slight movements of a baby’s mouth and eyes as well as the arms and legs.

The high-tech ultrasound procedure could also serve more practical purposes, such as diagnosing a wide range of diseases or defects including Down syndrome, health experts told Britain’s Sky News.

The revolutionary procedure reverses the long-standing belief that babies didn’t make facial expressions in the fetal stage, but rather learned those traits by mimicking their parents.

Now they are seen yawning, blinking, sucking their thumbs and smiling and crying long before they are born.

In addition, the startling images shows the fetuses moving their limbs just eight weeks after conception.

The technology, which was pioneered by London obstetrician Prof. Stuart Campbell from the Create Health Center for Reproduction and Advanced Technology, employs a technique called 3-D and 4-D scanning.

It enables doctors to conduct a far more detailed examination of the fetus by focusing up-close and on all sides of its body.

But Campbell says he hopes that the breakthrough technology will lead to further significant discoveries about fetal development.

“There are many more questions that can now be investigated,” Campbell said in an interview with Sky News.

“Do babies with genetic problems such as Down syndrome have the same pattern of activity as normal babies?

“Does the fetus smile because it is happy, or cry because it has been disturbed by some event in the womb?